Hello Sara,
We will need more detail to find you an answer.
Can you load the software in safe mode?
What error messages are you seeing?
Has this system ever had AV software installed?
Was it up to date?
Do you have internet access?
Most AV vendors have online scanns to clean viruses from your workstation.
What happens when you attempt an online scan of your workstation?
http://security.symantec.com/sscv6/d...d=ie&venid=sym
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